CHEM103 Chapter Notes - Chapter 7: Black-Body Radiation, Magnetic Quantum Number, Electromagnetic Radiation

• School: University of Alberta
• Department: Chemistry
• Course: CHEM103
• Professor: Mariusz Klobukowski

Document Summary

All emr consists of energy propagated by electric and magnetic fields that increase and decrease in intensity as they move through space. Explains rainbows, magnifying glasses but cannot explain atomic scale. > frequency; number of cycles it undergoes per second, measured in hz. > wavelength; crest through, distance the wave travels during one cycle, > speed; distance it moves per unit of time, m/s. > amplitude; height of the crest, related to intensity of the radiation or brightness. > all waves in the spectrum travel at the same speed but differ in frequency. > spectrum is a continuum of radiant energy and wavelengths: so no real distinct shift from one to another, microwave crosses into ir radiation with high frequency has a short wavelength and ir into visible, eg white light. > visible; 750 nm red 400 nm violet. > energy is massless and its quantity can change continuously.